* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
.course-details nav {
  width: 100%;
  height: 0.88rem;
  background-color: #fff;
  padding: 0 0.3rem 0 0;
}
.course-details nav img {
  width: 0.6rem;
  display: block;
  float: right;
  position: relative;
  top: 50%;
  right: 0.26rem;
  transform: translateY(-50%);
}
.course-details main {
  margin-bottom: 4rem;
}
.course-details main > p {
  font-size: 0.36rem;
  text-align: center;
  padding: 0.4rem 0;
}
.course-details main .pic {
  width: 80%;
  margin: 0.3rem auto;
  border-radius: 0.1rem;
  overflow: hidden;
}
.course-details main .pic img {
  width: 100%;
}
.course-details main .content {
  width: 80%;
  margin: 0 auto;
}
.course-details main .content p {
  font-size: 0.3rem;
  line-height: 0.5rem;
  text-indent: 0.6rem;
}
.course-details main .play-list {
  width: 80%;
  margin: 0 auto;
  padding: 0.3rem 0;
  background-color: #fff;
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
}
.course-details main .play-list .progress-bar {
  display: flex;
  font-size: 0.2rem;
  padding-bottom: 0.3rem;
}
.course-details main .play-list .progress-bar span:first-of-type,
.course-details main .play-list .progress-bar span:last-of-type {
  flex: 1;
}
.course-details main .play-list .progress-bar span:last-of-type {
  text-align: right;
}
.course-details main .play-list .progress-bar span:nth-of-type(2) {
  flex: 3;
  height: 0.06rem;
  background-color: gray;
  border-radius: 0.5rem;
  position: relative;
  top: 0.14rem;
}
.course-details main .play-list .play-btn {
  display: flex;
  padding-bottom: 0.6rem;
}
.course-details main .play-list .play-btn span {
  flex: 1;
}
.course-details main .play-list .play-btn span img {
  width: 34%;
  vertical-align: middle;
}
.course-details main .play-list .play-btn span:nth-of-type(2),
.course-details main .play-list .play-btn span:nth-of-type(3),
.course-details main .play-list .play-btn span:nth-of-type(4) {
  text-align: center;
}
.course-details main .play-list .play-btn span:nth-of-type(2) img,
.course-details main .play-list .play-btn span:nth-of-type(3) img,
.course-details main .play-list .play-btn span:nth-of-type(4) img {
  width: 70%;
  padding: 0.14rem;
  border: 1px solid #ddd;
  border-radius: 50%;
}
.course-details main .play-list .play-btn span:nth-of-type(3) {
  margin: 0 0.4rem;
}
.course-details main .play-list .play-btn span:nth-of-type(3) img {
  width: 100%;
  padding: 0.24rem;
}
.course-details main .play-list .play-btn span:last-of-type {
  text-align: right;
}
.course-details main .play-list .interact-btn {
  display: flex;
}
.course-details main .play-list .interact-btn span {
  flex: 1;
  font-size: 0.24rem;
  text-align: center;
}
.course-details main .play-list .interact-btn span img {
  width: 20%;
}
